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प्रश्न
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Chromosomes are the thickest and shortest in telophase.
विकल्प
True
False
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उत्तर
False
Correct Statement: chromosomes are thickest and shortest in anaphase.
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संबंधित प्रश्न
Given below is a schematic diagram of a portion of DNA.
- How many strands are shown in the diagram?
- How many nucleotides have been shown in each strand?
- Name the parts numbered 1, 2, 3, 4 and 5 respectively.
- Name the DNA unit constituted by the parts 1, 2, 3 collectively.
Fill in the blank
The _______ (s) are surrounded by radiating rays called aster
Mention whether the following statement is (T) Or (F). Give reason in support of your answer.
The unfertilized human egg has half the number of chromosomes of the body cells.
Chromosomes are mainly made up of ______.
Choose the correct answer:
Chromosomes appear at equator in ____________
Write a sentence of the following:
Sheath
Choose the correct answer:
Telocentric chromosomes are _________________
How does colchicine act as mitotic poison? Is there any advantage of it?
Differentiate between
Chromatin and Chromosome.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Chromosomes other than sex-chromosomes are autonomous.
Duplicated chromosomes are joined at a point termed ______.
Give Reason:
The Law of independent assortment holds good for the gene pairs that occur in different pairs of chromosomes.
Name the following:
Pairs of chromosomes, present in human egg cells.
Name the following:
The pattern of arrangement of genes along a chromosome.
Complete the following sentence with appropriate word:
The number of chromosomes in humans is ________.
Column ‘II’ is a list of items related to ideas in Column ‘I’. Match the term in Column ‘II’ with a suitable idea given in Column ‘I’.
| Column I | Column II |
| Genetics | Chromosomes are similar in size and shape. |
| Autosomes | The alternative forms of a gene. |
| Recessive gene | Study of laws of inheritance of characters |
| Allele | A gene that can express only when in a similar pair. |
| Homologous chromosomes | Chromosomes are other than the pair of sex chromosomes. |
Describe the structure of sex chromosomes with the help of labelled diagram.
Generally, the recessive character is expressed only when present in a double recessive condition i.e. homozygous condition. However, a single recessive gene can express itself in human beings when the gene is present on ______
